0000000000589598
AUTHOR
A. Panebianco
Application of an interspecific competition model to predict the growth of Aeromonas hydrophyla on fish surfaces during refrigerated storage (Anwendung eines Konkurrenzmodells zwischen zwei Spezies zur Vorhersage des Wachstums von Aeromonas hydrophila auf Fischoberflächen während der Kühlphase)
The growth of Aeromonas hydrophila and the aerobic mesophilic plate count (APC) on gilthead seabream surfaces was evaluated during refrigerated storage (21 days). The related growth curves were compared with those obtained by a conventional third order predictive model obtaining a low agreement between observed and predicted data (Root Mean Squared Error = 1.77 for Aeromonas hydrophila and 0.64 for APC).The Lotka-Volterra interspecific competition model was used in order to calculate the degree of interaction between the two bacterial populations (beta_{Ah/APC} and beta_{APC/Ah}, respectively, the interspecific competition coefficients of APC on Aeromonas hydrophila and vice-versa). Afterwa…
Impiego di un modello predittivo per la microflora del salame S. Angelo in corso di asciugature
The authors carried out a study in order to apply an interspecific competition model to predict the microflora behaviour of S.Angelo IGP salami during the ripening. They consider 3 bacterial population (Lactic Acid Bacteria, Enterobacteria and Listeria monocytogenes – LAB, Ent and Lmo) using the observed curves obtained in a previous work as validation. The model applied setting to 0 all interaction terms does not fit the observed curves while the introduction of 3 interaction terms (betaLmo/LAB = 0.65; betaEnt/LAB = 0.4; betaLmo/Ent = 0.18) produce a good agreement with the observed behaviour of all populations.